Clunking noise from the rear of the car finally fixed!

[Tripod]

I got a clunk this morning leaving the garage and driveway. It happened upon brake application so my first thought was that a control arm bolt or something in the suspension or brakes might be coming loose. It went away after a couple attempts to recreate it. I'll check this trunk hinge stopper first, and by the way the trunk lid is badly misaligned (QC issue) right at the driver side hinge area so I need to look at this anyway. Thanks for the thread.

 

[David.85D]

For me after some troubleshooting I figured out for my M3 there was no rattle with the L (larger) seat down. 3” of black electrical tape around the black metal hook did the trick and is not unsightly as it is black as well. Hope this helps.
View attachment 863221

If you are going to do this, try the Tesa fabric based tape. It doesn’t get gooey in warm temps. It is made to wrap wiring harnesses and keep them from being noisy.

 

[works]

Legends. Thanks!

 

[Thekuai]

Same issue and resolution here, 2023 3rwd.

Question? Did any of you install a door/trunk/frunk seal kit as well? I don't think I had issues until I installed the extra rubber seal kit on the trunk.

 

[Said Babayev]

Thank you so much!! This noise was driving me nuts for the past few months! However instead of unscrewing the bolt, I screwed it in instead so it doesn't touch the boot part.

 

[thatdubiekid]

Found my rear clunk in my 2018 M3 RWD!! It was the rear seat latch. Couple wraps of electric tape on the latch rung and blammo!! No more tip tap rattle trap on bumpy roads!

Thanx TMC community!!

 

[thatdubiekid]

For me after some troubleshooting I figured out for my M3 there was no rattle with the L (larger) seat down. 3” of black electrical tape around the black metal hook did the trick and is not unsightly as it is black as well. Hope this helps.
View attachment 863221

This fixed my rear rattle / clunk!!

 

[matthqh]

I am posting this in case someone in the future may have the same problem. I searched for the source of this rattle/clunk for months with no luck.

I had a rattle/clunking noise that sounded like it was coming from inside the rear of the car around the back seats. It only happened on rough roads or when going over uneven pavement such as driving up onto my driveway or going over potholes.

It turns out the trunk itself was moving when the car flexed. There are adjustment bolts on each trunk hinge that are supposed to support the forward part of the trunk. The bolts on my 2021 M3 were run completely in. You could push down on each side of the forward trunk and get it to move. I slowly adjusted the bolt heads outward and repeatedly closed the trunk to make sure I was not going too far. I couldn't find any documentation on proper trunk hinge adjustment but I made sure the trunk was not preloaded on the hinge.

I have attached pictures to help.

This noise drove me crazy for a while and Tesla service couldn’t find it. It would be nice if the moderators pinned a thread for confirmed rattle and noise fixes.

This was the exact problem. You're a genius! Thank you so much for posting this!